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sneezeweed

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sneeze⋅weed

  [sneez-weed]
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–noun
any of several coarse composite plants of the genus Helenium, the flowers of which resemble sunflowers and cause sneezing.
Origin:
1830–40; sneeze + weed 1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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sneeze·weed   (snēz'wēd')   
n.  

  1. Any of several New World herbs of the genus Helenium of the composite family, having yellow to red-purple rayed flower heads.

  2. See sneezewort.

sneeze·wort   (snēz'wûrt', -wôrt')   
n.  A Eurasian herb (Achillea ptarmica) of the composite family, having aromatic, linear, finely serrate leaves and clusters of white flower heads grouped in corymbs. Also called sneezeweed.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Encyclopedia

sneezeweed

any of about 40 species of tall herbs constituting the genus Helenium of the family Asteraceae, native to North America. Most are perennials with flat-topped clusters of yellow, brown, or red flower heads and leaves that alternate along the stem. Summer- or fall-blooming species are cultivated as border plants. The disk flowers are darker than the ray flowers, which may be turned back.

Learn more about sneezeweed with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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